iOS按比例实现方块图

本文实例为大家分享了iOS按比例实现方块图的具体代码，供大家参考，具体内容如下

原理：二分法递归实现，就是每次“对半分”，分到只剩两个

上代码：SZBlockView

@interface SZBlockView : UIView@property (nonatomic, strong) NSArray *data;//数据源@end #import 'SZBlockView.h'#import 'SZItemView.h' @implementation SZBlockView - (instancetype)initWithFrame:(CGRect)frame{ self = [super initWithFrame:frame]; if (self) {self.backgroundColor = UIColor.whiteColor; } return self;} -(void)setData:(NSArray *)data{ _data = data; [self removeAll]; for (NSString* value in data) {[self addSubNode:[value intValue]]; } [self recalcLayout];} -(void)addSubNode:(int)value{ SZItemView* item = [SZItemView new]; item.value = value; [self addSubview:item];} -(void)removeAll{ //移除所有子视图 [self.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];} -(bool)isVertical:(double)w Height:(double) h{ return w / h > 1.618;//黄金比例，可以自己根据需求修改} -(void)recalcLayout{ if (self.subviews.count < 1) return; [self recalcSquarifiedLayout:0 Finish:self.subviews.count - 1 Area:self.bounds];} -(void)recalcSliceLayout:(NSUInteger)nStart Finish:(NSUInteger)nFinish Area:(CGRect)rect IsVertical:(bool) bIsVertical{ NSAssert(nStart < self.subviews.count, @'nStart >= self.subviews.count'); NSAssert(nFinish < self.subviews.count, @'nFinish >= self.subviews.count'); if (nStart == nFinish) {[self.subviews[nStart] setFrame:rect];return; } double dblTotal = [self getChildrenTotal:nStart Finish:nFinish]; double x = rect.origin.x; double y = rect.origin.y; if (bIsVertical) {for (NSUInteger i = nStart; i <= nFinish; i++){ SZItemView* item = self.subviews[i]; double cx = rect.size.width * item.value / dblTotal; CGRect rectSubNode = item.frame; rectSubNode = rect; rectSubNode.origin.x = x; if (i == nFinish) {rectSubNode.size.width = cx; }else{rectSubNode.size.width = cx-1; }item.frame = rectSubNode;x += cx;} } else {for (NSUInteger i = nStart; i <= nFinish; i++){ SZItemView* item = self.subviews[i]; double cy = rect.size.height * item.value / dblTotal; CGRect rectSubNode = item.frame; rectSubNode = rect; rectSubNode.origin.y = y; if (i==nFinish) {rectSubNode.size.height = cy; }else{rectSubNode.size.height = cy-1; }item.frame = rectSubNode; y += cy;} }} -(void)recalcSquarifiedLayout:(NSUInteger)nStart Finish:(NSUInteger)nFinish Area:(CGRect) rect{ NSAssert(nStart < self.subviews.count, @'nStart >= self.subviews.count'); NSAssert(nFinish < self.subviews.count, @'nFinish >= self.subviews.count'); if (nStart + 2 > nFinish) {return [self recalcSliceLayout:nStart Finish:nFinish Area:rect IsVertical:[self isVertical:rect.size.width Height:rect.size.height]]; } double total = [self getChildrenTotal:nStart Finish:nFinish],total_left = 0.; for (NSUInteger i = nStart; i <= nFinish; i++) {SZItemView* item = self.subviews[i];double pre_dt = total_left - total / 2;total_left += item.value;double dt = total_left - total / 2; if (dt > 0){ if (dt + pre_dt > 0) {total_left -= item.value;i--; } if ([self isVertical:rect.size.width Height:rect.size.height]) {CGRect rectLeft = rect;rectLeft.size.width = rect.size.width * total_left / total - 1;[self recalcSquarifiedLayout:nStart Finish:i Area:rectLeft]; CGRect rectRight = rect;rectRight.origin.x = rectLeft.origin.x + rectLeft.size.width + 1;rectRight.size.width = rect.size.width - rectLeft.size.width - 1;[self recalcSquarifiedLayout:i + 1 Finish:nFinish Area:rectRight]; } else {CGRect rectTop = rect;rectTop.size.height = rect.size.height * total_left / total - 1;[self recalcSquarifiedLayout:nStart Finish:i Area:rectTop]; CGRect rectBottom = rect;rectBottom.origin.y = rectTop.origin.y + rectTop.size.height + 1;rectBottom.size.height = rect.size.height - rectTop.size.height - 1;[self recalcSquarifiedLayout:i + 1 Finish:nFinish Area:rectBottom]; } return;} } // NSAssert(false, @'unreachable');} -(double)getChildrenTotal:(NSUInteger)nStart Finish:(NSUInteger) nFinish{ double dblTotal = 0.; for (NSUInteger i = nStart; i <= nFinish; i++) {SZItemView* item = self.subviews[i];dblTotal += item.value; } return dblTotal;} @end

SZItemView 里面的每一个小的视图

@interface SZItemView : UIView@property (nonatomic, assign) int value;//传入要显示的值@end #import 'SZItemView.h'@interface SZItemView ()@property (nonatomic, strong) UILabel *valueLabel;@end @implementation SZItemView - (instancetype)init{ self = [super init]; if (self) {[self setupUI]; } return self;}-(void)setupUI{ UILabel *valueLabel = [[UILabel alloc] initWithFrame:self.frame]; valueLabel.adjustsFontSizeToFitWidth = YES; self.valueLabel = valueLabel; valueLabel.textAlignment = NSTextAlignmentCenter; valueLabel.textColor = UIColor.whiteColor; [self addSubview:valueLabel];} - (void)setValue:(int)value{ _value = value; self.valueLabel.text = [NSString stringWithFormat:@'%d',value]; self.backgroundColor = UIColor.orangeColor;}- (void)layoutSubviews{//如果用masonry布局此方法可不实现 self.valueLabel.frame = self.bounds; self.valueLabel.adjustsFontSizeToFitWidth = YES;}@end

效果图：

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